Photographic apparatus



P 1938- I J. J. JOHNSON 2,129,326

PHOTOGRAPHIC APPARATUS Filed June 26, 1937 2 Sheets-Sheet 1 Sept. 6, 1938. J. J. JOHNSON PHOTOGRAPHIC APPARATUS F i l ed June 26, 1957 2 Sheets-Shet 2.

mm W M N w Nm 1 I i A g q W i M. I /\\\V mh N Sm F6. NM. mm mm .QN W ..LLLLLFTY .E ..11.I LLTA. -w v Mm FY Patented Sept. 6, 1938 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to photographic appa-- ratus.

More specifically, the invention relates to an attachment for photographic cameras for a con- 5 tinuous reproduction of lengthy copies of records of a character such as Schlumberger electrical logs, seismograph records, driller logs, etc., the

attachment embodying means whereby the reproduction may be enlarged, reduced, or of the same size as the original.

It is necessary with apparatus now in use to reproduce lengthy copies in relatively short sections, the length of which are determined by the twenty-four'inches.

While by this procedure a complete reproduction may be'obtained, it does not meet the maximum requirements from the standpoint of time, economy in material and quality of the completed reproduction for the reason that it is necessary to paste the short sections together which is not only time consuming, but material is wasted in overlapping of the section and through inadvertence the sections are sometimes placed out of order, thus resulting in a highly objectionable reproduction. I

A primary object of this invention is the provision of an attachment for photographic cameras whereby the above noted objections to the apparatus heretofore used are substantially overcome.

A further object of the invention is the provision of an attachment for photographic cameras whereby lengthy copies of records or characters 3- can be reproduced continuously and in a single unitary strip. a

A still further object of the invention is the provision of an attachment for a camera whichis relatively simple in construction, accurate in operation, and which can be manufactured at a relatively low cost. i

With the above objects in view as well as others that will become obvious in the course of the following disclosure, reference will be made-to the accompanying drawings, in which? Figure l is a side elevation of the device in focal range of the camera which is usually tographic camera of any well known construction for the reproduction of characters, records, etc. The camera C is in accordance with well known practice adjustably supported on a frame F, the adjustment being determined by a scale S. Supported by the frame F is a table T which is vertically adjustable by means of threaded rod 1', gears g and handle 12., the vertical adjustment 'being relative to lens L and prism P of the camera C for determining the relative size of the reproduction and original copy. The vertical adjustment of the table T is determined by the scale 8 The camera C further includes the paper roll magazine M, the paper winding roll R and the severing knife K. i

The attachment forming the subject of the present invention embodies a copy strip propelling means supported by the table T vertically below the prism P and a variable drive'H between' the propelling means l0 and the paper winding roll R, whereby the speed ofmovement of the strip may be varied in accordance with the focal adjustment of the camera determined by the scale S The strip propelling means l0 comprises a pair ofhorizontally spaced rollers l2 and I3 rotatably supported by pintles It and I5, respectively, which are carried at the opposite ends of a plate l6 supported above the table T by legs H. The rollers l2 and l3v are embraced by a. conveyor belt I8, the upper stretch of which moves beneath a glass l9 at the forward edge of which is a guide 20 to facilitate feeding of the end of the copy strip between the belt l8 and glass [9. The copy stripbeneath glass I9 is illuminated by means of mercury vapor tubes 2 l.

The drive ll comprises a pair of frusto-conical rollers 22 and 23, the opposite ends of which are supported by frame F adjacent the bottom thereof. The rollers 22 and 23 while not necessarily, are preferably of such conicity that one end has a diameter double that of the opposite end and the rollers are disposed with their larger ends adjacent opposite ends of the frame, whereby the space between the rollers is of uniform width from end to end and the lines defining the upper edge of the roller 22' and the lower edge of the roller 23 in side elevation thereof are parallel. The rollers 22 and 23 preferably have their opposite ends journaled in bearings 24 and 25. which are rigidly supported by brackets 26 suitably secured to the frame F. I

The roller 22 is constantly driven at uniform speed by means of a. motor 21 provided with suitpaper feed roll R, the pulleys and 32 being of the same diameter, whereby the roller 22 and paper feed roll R rotate at the same speed.

Rotataby supported by the frame F are a plurality of idler pulleys 33 for properly directing the opposed reaches of the belt 3| between the pulleys 30 and 32;

Secured to theshaft of the roller 23 adjacent the smaller end thereof and opposite the end of the roller 22 to which the pulley 30 is secured is a pulley 34 which is operatively engaged by a belt which engages and imparts rotation to the pulley 33 secured to the pintle I5 of the roller l3 for imparting movement to the conveyor belt l3. Rotatably supported by the frame F are a plurality of idler pulleys 31 for properly directin the opposed reaches of the belt 35. Rotation of the roller 22 is imparted to the roller 23 by means of a belt 33 which is maintained under tension or proper driving position by means of an idler roller 39 rotatably supported by a belt shifting member 30, the lower end of which pivotally and slidably engages a rod ll and to the upper end of which is pivotally secured at 42 a retaining latch 33 which engages a scale bar 44.

With the construction as above described the paper winding roll R is on the camera C and theroller 22 is driven at equal speeds of rotation by means ofthe motor 21 and interconnecting belts and pulleys as above described while the roller 23 is subject to rotation at various speeds dependent upon the location of the belt 33 lengthwise of the rollers 22 and 23, whereby the conveyor belt i3 may be driven at different speeds dependent upon the focal adjustment of the camera C as determined by the scale S for providing reproductions which are of the same size, smaller, or larger than the original which'is moved past the focal range of the camera by means of the conveyor belt I8.

In operation of the construction described, the table T is vertically adjusted relative to the camera lens L for any desired scale of reproduction of the original, same, reduced or enlarged as is determined by the scale S When the reproduction is to be of the same size as the original, the sensitized paper strip in the camera C and the copy strip supported on the belt l3 should travel at the same rates of speed and for such equal rates of speed the belt 33 will be positioned in the .center of the rollers 22 and 23 as is illustrated on the drawings, as at this point the rollers 22 and 23 are of equal diameter and the pulleys 30, 32, 34 and 36 are of equal diameter. The scale bar 43 is suitably graduated whereby the belt 33 may be shifted lengthwise of the rollers 22 and 23 to vary thecopy strip should travel faster than the sensi-,

tized camera strip and accordingly after proper vertical adjustment of the table T the belt 33 is shifted to the right to a position as indicated by the scale bar 43 for theparticular reduction designated by the scale S If the belt 38 is placed at the extreme right ends of the rollers 22 and 23 the copy strip will travel twice as fast as the sensitized camera strip and a reproduction of half the size of the original will result if the table T has been adjusted for such reduction. If the belt 38 is shifted to the left on rollers 22 and 23 the copy strip will travel slower than the sensitized camera strip for an enlarged reproduction at such size dependent upon the adjustment of the table T and the extent of movement of the belt 38 toward the left hand ends of the rollers 22 and 23. When the enlargement is to be twice the'original size the belt 33 will be positioned at the extreme left ends of the rollers 22 and 23.

Thus it will be apparent that a photographic attachment is provided whereby lengthy copies may be continuously reproduced on a single length of photographic papers and that the size of the reproduction relative to the original may readily be varied.

While the rollers 22 and 23 as described are of such conicity that the copy may be enlarged to double size or reduced to one-half size, the conicity may be such as to provide for a greater range in size of the reproduction.

Due to the reversed arrangement of the rollers 22 and 23 the tension on the belt 33 will be uniform regardless of the position lengthwise of the rollers and the reaction of the tensioned belt on the roller 39 will bind latch 43 against bar 33 to preclude inadvertent shifting of the belt from any adjusted position thereof.

When the belt 33 is to be shifted, the latch 33 is raised above bar 34 about pivot 42 whereupon the tension of the belt 33 is relieved and the member is then manually shifted along rod ll to the desired position as determined by the scale bar whereupon the latch 43 is moved downward into locking engagement with the bar 34.

It is to be noted that the pulley 33 and adjacent idler pulley 31 are supported by the table T and as these pulleys are disposed substantially at a vertex of the triangular formation of the belt 35 the tension of the belt will not be substantially altered upon vertical adjustment of the table T.

By use of the construction disclosed, lengthy copies ,of data, characters and records, etc., may be continuously reproducedwith resulting saving in time and material as well as a high quality of reproduction.

What is claimed is:

1. In combination with a photographic apparatus comprising a supporting frame, a camera having a sensitized paper winding roll, and a copy supporting table adjustably mounted relative to the camera for providing different scale reproductions of the copy, an attachment comprising a conveyor mounted on the table for continuously moving a copy strip through the focal range of the camera, a first and second pulley rotatably supported adjacent the bottom of the frame, the paper winding roll and conveyor each provided with an actuating pulley, a drive belt interconnecting the first rotatably supported pulleyand the paper winding roll pulley, power means imparting continuous rotation to the first pulley at adjacent its smaller end, and a drive belt operatively engaged with the rollers and adjustable axially thereof.

2. In combination with a photographic appa ra'tus comprising a supporting frame, a camera having a sensitized paperwinding roll, and a copy supporting table adjustably mounted relative to the camera for providing diflerent scale reproductions of the copy, an attachment comprising a conveyor mounted on the table for continuously moving a copy strip through the focal range of the camera, a first and second pulley rotatably supl rted adjacent the bottom of the frame, the paper winding roll and conveyor each provided with an actuating pulley, a

drive belt interconnecting the first rotatably supported pulley and the paper roll pulley.

power means imparting continuous rotation to.

the first pulley at uniform speed, a drive belt interconnecting the second rotatably supported pulley and the conveyor pulley, a variable drive 1 connectlon'between the first and second rotatably.

supported pulleys, the second named drive belt engaging an idler pulley at each sideof conveyor pulley and adjacent thereto, a'ndan idler pulley rotatably supported adjacent the topo! theirame, the conveyor pulley and idler pulleys adjacent thereto being substantiallya't the vertex of a' troughv formed-by the belt in surrounding all or the pulleys, whereby the tension inthe belt will remain substant constant-upon adjustment of the table.

JOHN J. JOHNSON. 

